Means for fastening paper sheets.



G. P. BUMP.

MEANS FOR. FASTENING PAPER SHEETS.

APPLICATION rum) JULY 16, 1910.

1,065,904. Patented June 24,1913.

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UNITED STATE S PATENT OFFICE.

GEORGE P. BUMP, OF LA CROSSE, WISCONSIN.

MEANS FOR FASTENING PAPER SHEETS.

Specification of Letters Patent.

Patented June 24, 191 3.

Application filed July 16, 1910. Serial No. 572,376.

turning this tongue back and threading itthrough a slit formed in the sheets so that the said sheets will he held together by the tongues cut from the paper sheets themselves, and my present invention is a development of that disclosed in an application for Letters Patent of the United States filed by me hlay 14, 1909, No. 495,985.

The object of my present invention is to provide an apparatus in the form of a stand adapted -to rest upon a table or other fixedv support which will receive the superimposed sheets and which willfasten them together by cutting a tongue therefrom as above described, the apparatus being manipulated by simply pressing upon a plunger or like movable carrier or operating member.

The invention consists in the features and combination and arrangement of parts here inafter described and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation of an apparatus embodying my invention, and Fig. 2 is a sectional view. Figs. 3 and 4 are views of details.

In these drawings 1 is a base plate from which a standard 2 extends upwardly, said standard having a lateral extension 3 supporting a shear plate 4 .and having also an upper lateral extension 5, of hollow form and open vertically and affording guide means for carriers or plungers 6 and 7, the plunger 6 working within the hollow guide 5 and the plunger 7 working within the tubular or hollow plunger (3, the latter plunger 7 being also formed hollow. The outer plunger or guide 6 carries at its lower end a stripper plate 8 and it is normally held up by means'of a spring 9 bearing under the upper flange 10 of the stripper, plunger or guide, and upon the upper end of the standard or guide 5. This spring therefore normally holds the stripper plunger or guide with the stripper plate 8 separate from the shear plate t so that the superimposed sheets to be fastened together may be introduced in the space between these plates.

As in the application above referred to, I employ a hollow punch 11 adapted to cut a substantially V shaped tongue from the superimposed sheets; a needle 12, to form a slit in the superimposed sheets adjacent the base of the tongue, and at the same time that the tongue is formed and a threading spring 13 to thread or tuck the end of the tongue through the eye 14 of the needle after the needle has penetrated the paper so that upon the rising movement of the needle the tongue will be drawn by the needle through the slit to complete the fastening. All of these parts, namely, the punch, the slittcr or needle andthe threading spring move down simultaneously to perform thelr functions and they are carried by the inner guide or plunger 7 This plunger is held normally raised by a spring 15 within the same bearing at its lower end upon a pin 7 passing through a slot in the inner tube and fixed v in the outer tube, and the said plunger is provided with a knob or cap 16 to receive pressure from the hand of the operator. Supposing the paper sheets to be in posi tion for operation thereupon the operator merely pressesdown on the knob or handle of the inner plunger 7, and this will carry the punch, the needle and the spring downwardly to cut the tongue from the paper sheets, cut the slit therein and tuck the tongue through the eye .of the needle and then upon release of the pressure upon the handle the needle will draw the tongue through the slit. The stripper plate 8 when pressure is applied by the hand to force the plunger downward, is carried down by the movement of the outer plunger 6 by the action of the spring 15 on the pin 7' of the outer plunger so as to clamp the paper between itself and the shear plate 4. These stripper and shear plates perform the same function as the stripper and shear plates in the application above referred to, and in the release of pressure from the handle the stripper plate will rise to normal position by means of the spring 9. The punch, the needle and the threading spring are all held at the lower end of the inner plunger by means of a wedge 15'. The threading spring, as in the form above described, rests normally against a spur or pro]ection 16' extending up from the stripper plate and when the plungers are forced downwardly In Fig. 3 I show a perspective view of the punch, this being formed of sheet metal with cutting edges at 19, and with right angular extensions 20, 20, extending from the main side portions of the punch. Further, the punch is shouldered at 21 and the exten sions 20 are provided with V shaped notches 22, and these receive a V shaped projection on the needle as illustrated in Fig. 4.

The holding wedge 15' bears on one side upon the needle and'the needle in turn bears upon the edges of the punch, it being observed that the width of the needle is sufiicient to reach from edge to edge of the ex tensions 20, while the threader 13 being of reduced width in respect to the needle though formed integral therewith, will extend into and play within the hollow punch. The shouldered portion of the punch fits against the lower part of a ferrule or collar 15 which fits within the lower part of the inner plunger, this ferrule having upper and lower flanges against which the wedge fits for holding the several parts in place.

At 17 I show aspring bearing upon a rod 18, which in turn bears upon the inner end of the stripper plate 8, tending to lift the said plate. ,7 p

It will be understood that when pressure is applied to the handle of the inner-plunger bot-h plungers or carriers move down simultaneously until the stripper plateres'tsfirmly upon the paper to be fastened, and then the continued movement of the inner plunger or carrier'performs the punching, slitting and folding operation. In other words, the paper is clamped before these operations are performed and the clamping operation takes place previous to the operation of the threader or folder upon the tongue.

It is important in a device of this character that the slit formed for the reception of the tongue be of minimum width to receive the tongue so that its edges will firmly grasp the tongue to hold the same in order to make a firm fastening. In my invention therefore the slitter is formed of thin metal,

and as thin as possible consistent with strength, and this slitter is given a rectilinear movement toward and from the shear plate so as to slit the paper by a movement directly at right angles thereto so that the slit formed will be no wider than the thickness of the metal composing the slitter.

Should the slitter be given a movement other than that described it will make an opening wider than its own thickness and this will be done by tearing the paper instead of merely puncturing it, and the edges of the slit will be so far apart as not to hold the tongue. F urthermore, by this rectilinear movement; or at rightangles to the paper I am enabled to employ a slitter of minimum thickness because there is no lateral strain brought to bear on the slitter which would tend to bend it and render: the device inoperative, but on the contrary the pressure comes upon theslitter only in the.

direction of its length and with a thin slitter all necessary resistance is provided by having the slitter move in a right line toward and from the paper. It is important also that the movement of the punch be rectilinear so as to have no movement in the direction of the plane of the paper after it begins to act thereon, as any lateral movement of the punch, or a deflection from a right line movement will prevent the maintenance of a proper cutting relation between the punch and the companion cutter or edge of the shear plate and, further, lateral movement of the punch will tend to tear the paper.

Like in the application above referred to, the apparatus comprises jaws, one of which has the shear plate supported thereon, and the other has the punch, slitter and threader supported thereby.

My invention may be described as consisting of an upright section 7 having another section which may be termeda lower section located at the lower end of the section first mentioned, and having an opening which, together with the opening in the base, alines with the knives carried by the section first mentioned I claim as my invention 1. 'In a paper fastening machine, a stand, a shear plate thereon, a tongue cutter, needle and threader, a carrier for said parts, a guide on the stand, a stripper plate operating between the tongue cutter, needle and threader and the shear plate, a carrier for the stripper plate, both of said carriers operating within the guide and means for operatin the carriers, substantially as described.

2. In combination with a stand, a shear plate supported thereon, a stripper plate with a carrier for the same. a second carrier, a punch, needle and threader carried by the second carrier, said needle having a tongue engaging portion. said punch being shaped to cut: a tongue from the paper. the needle being located adjacent the punch to form a slit near the base of the tongue and transverse to the longitudinal axis of the tongue. and the threader being arranged adjacent the needle to engage the tongue when the punch and needle are forced through the paper to turn the tongue backward 1nto engagement with the needle, the said punch, needle and threader being movable in unison toward and from the shear plate.

3. In combination, a stand, a shear plate, a stripper plate movable toward and from the shear plate, a carrier for the stripper, a punch, needle and threader, a second carrier upon which. said punch, needle and threader are all mounted to move in unison therewith toward and from the shear plate, said carriers having movement relative to each other.

4. In combination a stand, a shear plate, a stripper plate movable toward and from the shear plate, a carrier for the stripper, a punch, needle and threader, a second carrier upon which said punch, needle and threader are all mounted to move in unison therewith toward and from the shear plate, said carriers having movement rela-- tive to each other, one of said carriers deriving its movement from the movement of the other carrier.

5. In a paper fastening device, the combination of a stationary support, an upright section slidably carried by said support, another section connected to and located at the lower end of said first section, a cutting knife and a slitting knife rigidly mounted on the section first mentioned and projecting into said lower section, said slitting knife having a tongue engaging portion near its slitting edge, a base on which said support is mounted, said base and said lower section having openings in alinement with said knives, means for operating said sections to cut a tongue from the paper and slit the paper near the base of the tongue, and a folder secured to the section first mentioned for bending the end of the tongue into engagement with the slitting knife, whereby the tongue is automatically drawn through the slitted sheets upon return movement of the sections. 1

6. In a paper fastening device, the combination of a stationary support, an upright section slidably carried by said support, another section connected to and located at the lower end of the section first mentioned, a cutting knife and a slitting knife rigidly mounted on said first section and projecting into said lower section, said slitting knife having a tongue engaging portion near its slitting edge, a base on which said support is mounted, said base and said lower section having openings in alinement with said knives, means for operating said sections to cut a tongue from said paper and slit the paper near the base of the tongue, a folder secured to the section first mentioned,

and a lug on said lower section for normally holding the free end of said folder away from the slitting knife, said lug permitting the folder to bend the end of the ton ue into engagement with the slittin knife when the sections are depresse whereby the tongue is automatically drawn through the slitted sheets upon return movement of the sections.

7. In combination, a stand, a shear plate, a stripper plate having a carrier guided in the stand, a punch, needle and threader also having a guide carriage, a spring for lifting the stripper carrier and a spring for lifting the carrier of the punch, needle and threader, substantially as described.

8. In combination a stand, a shear plate, a stripper plate, a hollow plunger carrying the stripper plate, a guide on the stand for the said hollow plunger, a spring for raising up the stripper plate, a second plunger guided in the first plunger, a punch, needle and threader carried by the second plunger, said second plunger having its upper end adapted to receive pressure for forcing it down and a spring for elevating the inner plunger, substantially as described.

9. In combination, shear and stripper plates, a punch, needle and threader, a carrier for said parts and a wedge for holding the punch, needle and threaded to the carrier, substantially as described.

10. In combination with a stand, a punch, slitter and threader, a shear plate, a stripper plate, a spring and a rod bearing upon the said spring and acting upon the strip 'ier plate, substantially as described.

11. In combination, a stand, a shear plate, a tongue, cutter and a slitter, a folder for moving the tongue into engagement with the slitter, said tongue cutter, slitter and folder moving in unison, a tubular carrier upon which said parts are mounted, a stripper plate, a tubular carrier upon which said stripper plate is mounted, said carrier surrounding the lower end of the carrier first mentioned, a guide on the stand for said carriers, a spring within the inner carrier a cross pin passing through a slot in the inner carrier and mounted in the outer carrier, a handle upon the top of the inner carrier and spring means for lifting the outer carrier together with the stripper plate, which action through the cross pin and inner spring lifts the inner carrier, substantially as described.

In testimony whereof, I atiix my signature in presence of two witnesses.

GEORGE P. BUMP.

Witnesses: A

EMME'I'I B. HowARo, BASIL I. PETERSON. 

